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KIN

Backend Developer

King
On-site
Location
Barcelona, Catalonia, Spain
Experience
Senior
Posted
Posted May 10, 2026
Medium
Games + Interactive
Department
Backend Engineer
Type
Skills Required
Java C# Unity Docker Kubernetes
About the Role

Responsibilities:

  • Act as a key technical contributor within the backend team, owning the design, development, and evolution of critical backend services.
  • Design, implement, and optimize scalable, high-performance backend systems using Java.
  • Own and evolve core APIs for player progression and in-game economy systems, ensuring reliable and efficient integration with game systems.
  • Make architectural decisions that balance scalability, performance, and maintainability, aligned with existing frameworks and long-term goals.
  • Lead the resolution of complex technical challenges requiring in-depth analysis and evaluation of multiple approaches.
  • Influence backend architecture and technical direction within the team, contributing to medium- and long-term improvements.
  • Identify systemic issues and drive improvements across the codebase, tooling, and development workflows.
  • Operate effectively in a DevOps‑driven environment, taking responsibility for deploying, monitoring, and maintaining services in production.
  • Collaborate cross‑functionally with game, platform, and infrastructure teams to ensure backend solutions align with product and business objectives.
  • Proactively contribute to planning and technical discussions, helping define effective and scalable solutions.
  • Provide technical leadership by mentoring engineers, guiding design discussions, and promoting engineering best practices.
  • May lead small initiatives or projects, ensuring alignment and high‑quality delivery.

Minimum Requirements:

  • Proven experience designing, building, and operating complex, distributed backend systems at scale.
  • Strong ability to analyze complex technical problems and deliver effective, maintainable solutions.
  • Experience contributing to architectural decisions and influencing technical direction within a team.
  • Ability to work independently and drive technical initiatives with minimal supervision.
  • Strong proficiency in Java for backend development, with the ability to implement and maintain scalable systems.
  • Experience with NoSQL databases (e.g., Cassandra) and working with large‑scale backend infrastructure.
  • Experience with the Spring Framework for building, managing, and securing backend services.
  • Experience in UNIX‑based environments and proficiency with Git for version control.
  • Hands‑on experience with cloud technologies, particularly Google Cloud Platform (GCP) or Google Kubernetes Engine (GKE).
  • Experience with containerization and orchestration (Docker, Kubernetes).
  • Familiarity with CI/CD tools like Jenkins or similar automation systems.
  • Experience with Gradle build systems for managing dependencies and builds.
  • Strong communication skills to work effectively within the backend team and across departments.
  • Ability to operate in a DevOps environment, monitoring and managing production deployments.
  • Passion for gaming and the ability to contribute to fast‑evolving, high‑impact projects.
  • Exposure to C# and the Unity engine.
KIN
About the Studio
King
5 offices
1001-5000 employees
Founded 2003
64 open roles
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